How to correctly shut down a high corrosion-resistant and wear-resistant multi-stage pump

Category: Water pump knowledge

2025-05-19

The shutdown process for a high corrosion-resistant and wear-resistant multi-stage pump must follow certain steps and precautions. Proper shutdown methods help extend the pump's service life and improve production efficiency. Therefore, operators should strictly follow the relevant procedures during shutdown to ensure the safe and stable operation of the pump.

I. Overview

High corrosion-resistant and wear-resistant multi-stage pumps are widely used in the chemical, pharmaceutical, and environmental protection industries, and are favored for their high efficiency, stability, and durability. To ensure the long-term stable operation and extended service life of the pump, proper shutdown methods are crucial.

II. Pre-shutdown Preparations

1. Gradually Reduce Load: Before preparing to shut down, the pump's speed and load should be gradually reduced to avoid damage to the pump caused by sudden shutdown.

2. Close Inlet and Outlet Valves: Close the pump's outlet valve first, then the inlet valve, ensuring stable liquid pressure within the pump.

3. Disconnect Power: After ensuring the pump has stopped rotating, disconnect the power to avoid unnecessary energy consumption and safety hazards.

III. Correct Shutdown Procedure

1. Operate Control Switch: According to the operation manual or on-site instructions, correctly operate the control switch to gradually decelerate and stop the pump's rotation.

2. Close Relevant Valves: After confirming that the pump has completely stopped rotating, close the outlet, inlet, and other auxiliary valves related to the pump.

3. Drain Residual Liquid: Open the bottom drain valve of the pump to completely drain the residual liquid inside the pump to prevent long-term retention from causing corrosion or sedimentation.

4. Cleaning and Maintenance: After shutdown, clean and maintain the pump, removing surface dirt and impurities, and keeping the pump dry and clean.

IV. Precautions

1. Avoid Emergency Shutdown: Avoid emergency shutdowns during normal operation to prevent damage to the pump. Emergency shutdowns may cause the impeller to collide with the casing, increasing wear and corrosion.

2. Regular Inspection and Maintenance: Regularly inspect and maintain the pump to ensure it is in good working condition. If any abnormalities are found, they should be addressed promptly.

3. Operator Training: Ensure that operators have received professional training and are familiar with the pump's performance, characteristics, and operating methods to avoid damage caused by misoperation.

Previous: Selection Guide for High Corrosion and Wear Resistance Multistage Pumps

Next: Analysis of the causes of water leakage in high corrosion-resistant and wear-resistant multi-stage pumps

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